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<body><h1><a href="http://ejohn.org/blog/processingjs/">Processing.js</a></h1>
<h2>SimpleCurves</h2>

<p>Simple curves are drawn with simple equations. 
By using numbers with values between 0 and 1 in
the equations, a series of elegant curves
are created. The numbers are then scaled to fill the screen.</p>

<p><a href="http://processing.org/learning/basics/simplecurves.html"><b>Original Processing.org Example:</b> SimpleCurves</a><br>
<script type="application/processing">
void setup() {
  size(200, 200);
  colorMode(RGB, 100);
  background(0);
  noFill();
  noLoop();
}

void draw() {
  stroke(40);
  beginShape();
  for(int i=0; i<width; i++) {
   vertex(i, singraph((float)i/width)*height);
  }
  endShape();
  
  stroke(55);
  beginShape();
  for(int i=0; i<width; i++) {
   vertex(i, quad((float)i/width)*height);
  }
  endShape();
  
  stroke(70);
  beginShape();
  for(int i=0; i<width; i++) {
   vertex(i, quadHump((float)i/width)*height);
  }
  endShape();
  
  stroke(85);
  beginShape();
  for(int i=0; i<width; i++) {
   vertex(i, hump((float)i/width)*height);
  }
  endShape();
  
  stroke(100);
  beginShape();
  for(int i=0; i<width; i++) {
   vertex(i, squared((float)i/width)*height);
  }
  endShape();
}

float singraph(float sa) {
  sa = (sa - 0.5) * 1.0; //scale from -1 to 1
  sa = sin(sa*PI)/2 + 0.5;
  return sa;
}

float quad(float sa) {
  return sa*sa*sa*sa;
}

float quadHump(float sa) {
  sa = (sa - 0.5); //scale from -2 to 2
  sa = sa*sa*sa*sa * 16;
  return sa;
}

float hump(float sa) {
  sa = (sa - 0.5) * 2; //scale from -2 to 2
  sa = sa*sa;
  if(sa > 1) { sa = 1; }
  return 1-sa;
}

float squared(float sa) {
  sa = sa*sa;
  return sa;
}
</script><canvas width="200" height="200"></canvas></p>
<div style="height:0px;width:0px;overflow:hidden;"></div>

<pre><b>// All Examples Written by <a href="http://reas.com/">Casey Reas</a> and <a href="http://benfry.com/">Ben Fry</a>
// unless otherwise stated.</b>
void setup() {
  size(200, 200);
  colorMode(RGB, 100);
  background(0);
  noFill();
  noLoop();
}

void draw() {
  stroke(40);
  beginShape();
  for(int i=0; i&lt;width; i++) {
   vertex(i, singraph((float)i/width)*height);
  }
  endShape();
  
  stroke(55);
  beginShape();
  for(int i=0; i&lt;width; i++) {
   vertex(i, quad((float)i/width)*height);
  }
  endShape();
  
  stroke(70);
  beginShape();
  for(int i=0; i&lt;width; i++) {
   vertex(i, quadHump((float)i/width)*height);
  }
  endShape();
  
  stroke(85);
  beginShape();
  for(int i=0; i&lt;width; i++) {
   vertex(i, hump((float)i/width)*height);
  }
  endShape();
  
  stroke(100);
  beginShape();
  for(int i=0; i&lt;width; i++) {
   vertex(i, squared((float)i/width)*height);
  }
  endShape();
}

float singraph(float sa) {
  sa = (sa - 0.5) * 1.0; //scale from -1 to 1
  sa = sin(sa*PI)/2 + 0.5;
  return sa;
}

float quad(float sa) {
  return sa*sa*sa*sa;
}

float quadHump(float sa) {
  sa = (sa - 0.5); //scale from -2 to 2
  sa = sa*sa*sa*sa * 16;
  return sa;
}

float hump(float sa) {
  sa = (sa - 0.5) * 2; //scale from -2 to 2
  sa = sa*sa;
  if(sa &gt; 1) { sa = 1; }
  return 1-sa;
}

float squared(float sa) {
  sa = sa*sa;
  return sa;
}</pre>
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